Some GM models have suffered from the REP problem because of a fault affecting the throttle assembly. To get the warning to go off and stay off, you (or your mechanic) will need to fix whatever underlying problem triggered it in the first place. As previously mentioned, your vehicles PCM may trigger the Reduced Engine Power Mode upon detecting a system failure. Engines are increasingly coming standard with turbochargers. However, doing so is not recommended. When diagnosing the ETC throttle as it operates, listen for any noises during idle as you or an assistant depress the accelerator pedal. Chevrolet Customer Service: 1-800-222-1020. The throttle position sensor is nearby, close to the butterfly valve, and needs to be functional to allow unobstructed airflow. an error code P1516 is a diagnostic error code unique to the manufacturer. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Remove the key from the ignition lock cylinder. The technology was first introduced on the 1997 C5 Corvette. In their place is a complicated web of sensors and electronic control units (ECU) known as a drive-by-wire system. If necessary, check with your local dealer for any service bulletin or recalls on your particular vehicle make and model. They want to charge me almost $500 just to check it out. GM Service Update number: N212316020. In addition, it also happens due to problems with the oxygen sensor, dirty mass airflow sensor, and . This is especially true if battery cells are faulty or dead. The plaintiff also alleges GM knows there are problems with the cars because of customer complaints and warranty claims related to the Malibu cars suffering reduced engine power. Dont drive the vehicle if youve already returned home and the light turns on. Usually, this is associated with a fault in the electronic throttle control (ETC) system. This limited mode is intended to help the driver get to a service shop when the ECM or transmission control module (TCM) detects a serious problem with a vital sensor, circuit, engine control or transmission component that requires immediate attention. Message or call 877-795-3666 today. Computer: The electrical and mechanical systems of the car are put under additional stress by a poor battery." Installing a new catalytic converter will solve the problem of a reduced engine. "@type": "Question", **ATTENTION, if you are a current owner of a 2018 Chevrolet Malibu and are experiencing loss of engine power, engine issues or the "Engine Power Reduced" warning light is illuminated often, give us a call. The following are some actions you may take to diagnose a vehicle that is currently in this mode: When you notice that your Chevy Impala engine power reduced is on, start by inspecting your catalytic converter. By consulting your owners manual or using our instructions on how to check and add transmission fluid, you can check the fluid yourself. Most of the time, a dead/damaged cell in the battery or a loose ground wont result in the engine power reduced Chevy Silverado power light turning on. The vehicle does not accelerate past a certain speed, even when you are revving it up. The TAC System. TSBs address known issues by documenting a repair procedure that will (hopefully) fix the problem on certain makes and models. But all too often, solving the problem involves advanced diagnostic skills and equipment that most DIYers dont have. As was mentioned, one of the primary causes of Reduced Power Mode is a problem with the TAC system. Unplug the connector and check for dirt or corrosion. You can at the very least purchase a replacement sensor to prevent any price gouging from happening. I travel 40+ miles each way to work in Atlanta traffic with speeds around 65-80 (big. It is best to tow your vehicle to the nearest repair facility, as driving at extremely low speeds can be dangerous. Life After Life 4.98K subscribers Subscribe 1.8M views 5 years ago GM and GMC vehicles have been plagued by throttle position sensor problems along with. Car ReviewsExperiencesNewsMotorsportProduct ReviewsTroubleshootingTrending. GMC Customer Service: 1-800-462 . There a many possible reasons why your car might exhibit a hesitation and/or lack of acceleration. How do you reset the reduced engine power light? After I turned off and restarted the engine, the "P2138" code . If the motor in your automobile isnt generating as much power as it should, you probably have an electrical issue. But so far GM's response has been terrible. Use the shop rag to remove varnish and carbon deposits from inside the throttle walls, around and under the throttle valve. When you notice engine power is reduced Chevy Impala, you should repair any malfunctioning components to clear out any other possible problems. Also, there are instances where a vehicle will shut off completely after entering Reduced Engine Power mode. A gearbox error code is another problem that will most likely set off the check engine light before the low engine power light. If your Impala has experienced this signal about reduced engine power, a component of its engine control indicators or the ECU is malfunctioning. Your cars primary computer, often known as the powertrain control module (PCM), triggers Reduced Power Mode when it detects a system failure. In general, its simpler to replace the throttle body as a whole than to repair each component separately. The consent submitted will only be used for data processing originating from this website. PI0759: Mentions that Reduced Engine Power Mode may be triggered due to a faulty manifold absolute pressure (MAP) sensor connector pigtail. The reason we say such cases are "rare" is that many models do not have a TAC system; instead, they have a traditional throttle body and linkage. A: The "Engine Power Is Reduced" warning on your Chevy Malibu might be caused by a few different things. Manage Settings Utilizing a specialized battery tester and analyzer with diagnostic tools will provide you with the only accurate assessment of your batterys condition. } Photo courtesy of Saitobesho on Wikimedia. According to the plaintiff, a warning message indicates "Engine Power is Reduced" as the car suddenly loses power while driving. The Truth. Ask me anything! In some instances, you might get lucky, and a simple procedure, such as cleaning the throttle body, will get your vehicle out of Reduced Power Mode. September 11, 2019. As a Chevy Malibu 2016 through 2018 driver, there's a chance you've, at some point, seen a notice that read "Engine Power is reduced". Rothschild, et al., v. General Motors,LLC. What Happens When Rack and Pinion Goes Out? Depending on your particular vehicle model and the fault detected by the computer, a Reduced Engine Power message may appear along with a particular trouble code in the ECM's memory: On drive-by-wire systems, pay special attention to DTCs that point to the throttle actuator. Applying that procedure from the beginning can save you both time and money. Brake System Warning Light: What Does It Mean? The mass airflow sensor is responsible for measuring the amount of air that enters the engine. Checking technical service bulletins (TSBs) issued by the vehicle manufacturer can also be very helpful. The most frequent and simplest fuel system issue is the fuel filter, although problems with the fuel line or the fuel pump could also be to blame for a lack of power. Some GM vehicles will enter Reduced Engine Power Mode when the engine begins to overheat due to cooling system issues. the TAC module harness is damaged or open. Most late-model vehicles contain dozens of computers (also known as modules) that communicate with one another over a data network. Basically, OBD code P1516 indicates that the Throttle Actuator Control (TAC) system is having issues. "@type": "FAQPage", Hutchinson, et al., v. General MotorsLLC. But just in case its not, the reduced engine power light alerts you to any problems. Replacement batteries are frequently changed and are typically not very expensive. Your engines control management system is malfunctioning, as shown by the reduced power check engine light. Ask me anything! "@type": "Question", General Motors is recalling 22 model year 2021-2022 Chevrolet Corvettes. Todays cars contain a bunch of computers and electronics that can be easily damaged by water intrusion. This valves damage or breakage could cause the engine power reduced Chevy Silverado power light to come on. The engine will be decreased to make up for what the Diagnostic sensors see as a potential fault when they discover a malfunction with the converter. Recall: Dodge Durango Rear Spoilers Could Fall Off, read stories from drivers who praise our work. 1. The engine power reduced Chevy Silverado power light will turn on whenever the vehicle's computer detects an issue with the components that make sure that the engine will run smoothly, which includes the throttle sensors, oxygen sensors, as well as airflow sensors. I hope that I can make your troubleshooting quicker and as easy as possible. What Cars Have Power Seats? Though its possible that simply charging your battery will do. The issue code P1516 may also have this as a cause if it is not. Inappropriate air/fuel ratio caused by sensor faults mass airflow sensor is often a major cause. The car may have trouble achieving high revs if there is blocking or a leak in the fuel injectors. You can also check for recalls specific to your vehicle by going to this NHTSA database site. The light will not always be present in the car that does have this warning system, nor is it present in all of them. After the exhaust manifold, the catalytic converter is set underneath the car. Check the Throttle Body Engine Control and Throttle Body Motor Control circuits for issues when inspecting the TAC Module. Even if power isnt reduced immediately, performance may be limited the next time you go to drive the car. Have a car complaint to add? What's Up With Chevy's Engine Power is Reduced Warning? It's crucial to take action if you notice a decrease in engine power. I have a 2013 xts I left the sunroof open and my interior got soaked. Keep an eye out for frayed or exposed wiring. Resetting the reduced engine power light may not solve the issue. This can cause an array of problems, including a vehicle that enters Reduced Engine Power mode. For instance, the problem could be one (or both) of the APP sensors, which are usually integrated into the accelerator pedal. Lawsuits about this problem have already been filed in court. Your car may experience problems due to an electrical malfunction, bad connections, loose wires, or a loose clamp. A clogged fuel filter is the likely culprit. Computer: The electrical and mechanical systems of the car are put under additional stress by a poor battery. It was a well understood problem by that time with throttle position codes to put me on the right track. "mainEntity": [{ Ask me anything car related and see if I can help you today. When the 'Engine Power Reduced' warning shows up on the screen of your car, you have to understand that the total power output of your engine has been reduced. Between the air filter and the intake manifold is where youll find the mass airflow sensor. } One or more of the following fixes can be used when a correct diagnosis has been made. Always keep an eye on the engine temperature. Here are some common reasons why this " Engine power reduced Chevy equinox " warning might come on: 01. Certain light duty pickup trucks and sport utility vehicles have a clearance between the front right-hand brake pipe and the body cross sill that could decrease to the point of . Once the car is fixed and the codes are cleared, the reduced power warning will go away. Thank you for signing up. The Chevrolet Malibu class action lawsuit was filed in the U.S. District Court for the Eastern District of New York - Rothschild, et al., v. General Motors, LLC. For example: The follwoing video gives you an overview of the operation of an electrnoic throttle control system and how it monitors faults. P2138 reduced engine problems My check engine light is on and says engine power is reduced. This will make it easier to detect loose, corroded or damaged connections that might be affecting sensors, actuators or system circuits. Case Filed TAC module harness can be fixed or completely replaced. Save my name, email, and website in this browser for the next time I comment. Company service bulletins indicated some problems with the Charge Air Cooler (CAC). Failing to do so can result in the vehicle entering Reduced Engine Power Mode. There are several issues that could negatively affect your power. If your vehicle has no unrepaired recalls, you will see the message: "0 Unrepaired recalls associated with this VIN". The throttle position sensor (TPS) on the Chevrolet Silverado 1500 is notorious for failure which causes: Check engine light. When an automatic transmission goes into limp-in mode, limited functionality may vary, depending on the particular vehicle make and model. It often lights up when a vehicle needs repair or maintenance; it doesnt necessarily indicate that your car is almost breaking down, but it might be due to an oil change. When one (or both) of the sensors goes bad, the vehicle will enter Reduced Engine Power Mode. These newer systems have their advantages but are known to cause delayed acceleration and are more prone to complicated electrical failures. A Chevy Malibu that allegedly suffered reduced engine power caused the owner to file a class action lawsuit that alleges all 2016-2018 Malibu cars have problems with the accelerator pedal sensors and electronic throttle controls. As air enters the engine, this sensor also assists with transmission shifting. Consequently, the definition of the P1516 engine code in a GM vehicle will differ from that in an Audi or a Hyundai. "@type": "Question", These tools have been tried and tested by our team, they are ideal for fixing your car at home. An . Every day, you drive to work. Always unplug the batteries before tinkering with wires or sensors while working with a cars electrical systems. Welcome to Motor Verso. The problem appears attributable to a defective accelerator pedal sensor. Then: Watch the following two videos that show how a damaged wire caused a Reduced Engine Power message to appear in a 2007 Chevy HD.